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| 苏州河重金属污染特征及风险评价 |
| Characteristics and risk assessment of heavy metals pollution in Suzhou River |
| 投稿时间：2023-11-20 |
| DOI：10.13259/j.cnki.eri.2024.02.002 |
| 中文关键词: 苏州河 地表水 沉积相 重金属 微生物 生态风险评价 |
| 英文关键词:Suzhou River surface water sedimentary phase heavy metals microorganism ecological risk assessment |
| 基金项目:国家自然科学基金资助项目（U2240205） |
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| 中文摘要: |
| 沿苏州河水流方向设置 13个采样点进行3次采样，分析苏州河中As、Cd、Cr、Cu、Pb、Zn的分布，采用主成因分析和冗余分析，评价了苏州河水相及沉积相中微生物的稳定性以及重金属对微生物的影响。通过计算健康风险指数、内罗梅指数、地累积指数和重金属分配系数，评价了地表水中重金属对暴露人群存在的风险以及流域的生态危害。结果表明，水相中主要为Zn、Pb、Cu，沉积相中Zn质量浓度最高；研究流域的物种丰富度变化甚微；As和Cr对成人和儿童均存在不同程度的致癌风险，Cd的潜在生态危害最大。 |
| 英文摘要: |
| The distribution of As, Cd, Cr, Cu, Pb and Zn in 13 sampling points along the flow direction of Suzhou River was analyzed by sampling 3 times. The stability of microorganisms in the aquatic phase and sedimentary phase of Suzhou River and the influence of heavy metals on microorganisms were evaluated by principal component analysis and redundancy analysis. Health risk index, Nerome index, geological accumulation index and heavy metals distribution coefficient were calculated to evaluate the risk of heavy metals in surface water to exposed population and the ecological harm of this basin. Results show that the aquatic phase mainly contains Zn, Pb and Cu, while the sedimentary phase has the highest concentration of Zn. There is little change of species richness in the studied basin. As and Cr have different degrees of carcinogenic risk for the adults and children, while Cd has the greatest potential ecological risk. |
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